Question

127

How can I determine the SelectedValue of a RadioButtonList in JavaScript?

rated 0 times [ 131] [ 4] / answers: 1 / hits: 78254 / 16 Years ago, mon, february 23, 2009, 12:00:00

I have an ASP.NET web page with a databound RadioButtonList. I do not know how many radio buttons will be rendered at design time. I need to determine the SelectedValue on the client via JavaScript. I've tried the following without much luck:

var reasonCode = document.getElementById(RadioButtonList1);

var answer = reasonCode.SelectedValue;

(answer is being returned as undefined)
Please forgive my JavaScript ignorance, but what am I doing wrong?

Thanks in advance.

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parker

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answered 16 Years ago magdalena · Accepted Answer

ASP.NET renders a table and a bunch of other mark-up around the actual radio inputs. The following should work:-

 var list = document.getElementById(radios); //Client ID of the radiolist

 var inputs = list.getElementsByTagName(input);

 var selected;

 for (var i = 0; i < inputs.length; i++) {

      if (inputs[i].checked) {

          selected = inputs[i];

          break;

       }

  }

  if (selected) {

       alert(selected.value);

  }